GB1513583A - Frequency modulator - Google Patents

Frequency modulator

Info

Publication number
GB1513583A
GB1513583A GB44178/75A GB4417875A GB1513583A GB 1513583 A GB1513583 A GB 1513583A GB 44178/75 A GB44178/75 A GB 44178/75A GB 4417875 A GB4417875 A GB 4417875A GB 1513583 A GB1513583 A GB 1513583A
Authority
GB
United Kingdom
Prior art keywords
frequency
terminal
modulator
capacitor
bistable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB44178/75A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ampex Corp
Original Assignee
Ampex Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ampex Corp filed Critical Ampex Corp
Publication of GB1513583A publication Critical patent/GB1513583A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/06—Frequency or rate modulation, i.e. PFM or PRM

Landscapes

  • Amplitude Modulation (AREA)
  • Television Signal Processing For Recording (AREA)
  • Manipulation Of Pulses (AREA)
GB44178/75A 1974-11-18 1975-10-27 Frequency modulator Expired GB1513583A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/524,656 US3944949A (en) 1974-11-18 1974-11-18 Frequency modulator

Publications (1)

Publication Number Publication Date
GB1513583A true GB1513583A (en) 1978-06-07

Family

ID=24090135

Family Applications (1)

Application Number Title Priority Date Filing Date
GB44178/75A Expired GB1513583A (en) 1974-11-18 1975-10-27 Frequency modulator

Country Status (9)

Country Link
US (1) US3944949A (de)
JP (1) JPS5237755A (de)
AT (1) AT346938B (de)
BE (1) BE835311A (de)
CA (1) CA1060553A (de)
DE (1) DE2551785C3 (de)
FR (1) FR2291648A1 (de)
GB (1) GB1513583A (de)
NL (1) NL168381C (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189113A (en) * 1986-04-12 1987-10-14 Thorn Emi Datatech Ltd A voltage-controlled oscillator

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2643949C3 (de) * 1976-09-29 1981-06-19 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum impulsmäßigen Übertragen von analogen Spannungswerten beider Polaritäten
JPS5932163A (ja) * 1982-08-18 1984-02-21 Nec Corp Ｃｍｏｓ集積回路
DE3413143A1 (de) * 1984-04-07 1985-10-17 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth Fm-modulator
DE3425671A1 (de) * 1984-07-12 1986-01-23 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und vorrichtung zum messen der daempfung an lichtwellenleitern
DE4013087A1 (de) * 1990-04-25 1991-10-31 Dierk Bobzin Verfahren zur pulsbreitenmodulation/demodulation, insbesondere zur aufzeichnung von videosignalen auf magnetische und optische datentraeger (parallelmodulator)
US7106130B2 (en) * 2003-09-05 2006-09-12 Delta Electronics, Inc. Variable frequency PWM controller circuit
JP2006020171A (ja) * 2004-07-02 2006-01-19 Fujitsu Ltd 差動型コンパレータ、アナログ・デジタル変換装置、撮像装置
US20060057864A1 (en) * 2004-09-13 2006-03-16 Joseph Jeffrey A Rotative electrical coupling
TWI306326B (en) * 2006-03-10 2009-02-11 Weltrend Semiconductor Inc Pulse frequency modulation oscillating circuit for a dc/dc converter

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3290617A (en) * 1962-07-09 1966-12-06 Northern Electric Co Frequency modulated relaxation oscillator
US3371291A (en) * 1965-01-11 1968-02-27 Astrodata Inc Current control of oscillator frequency
US3328724A (en) * 1966-01-26 1967-06-27 John L Way Voltage controlled free-running flip-flop oscillator
US3528036A (en) * 1968-07-12 1970-09-08 Ibm Fm modulator for video recording
US3581239A (en) * 1969-03-05 1971-05-25 Motorola Inc Frequency modulated crystal controlled oscillator operable at a plurality of temperature compensated center frequencies
JPS4866361A (de) * 1971-12-14 1973-09-11
JPS4960468A (de) * 1972-10-09 1974-06-12
US3794934A (en) * 1972-11-02 1974-02-26 Gte Sylvania Inc Non-saturating oscillator and modulator circuit
US3842371A (en) * 1973-10-12 1974-10-15 Honeywell Inc Voltage to frequency converter
JPS50156864A (de) * 1974-06-06 1975-12-18

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2189113A (en) * 1986-04-12 1987-10-14 Thorn Emi Datatech Ltd A voltage-controlled oscillator
GB2189113B (en) * 1986-04-12 1990-04-25 Thorn Emi Datatech Ltd A voltage-controlled oscillator

Also Published As

Publication number Publication date
ATA874575A (de) 1978-04-15
NL7513453A (nl) 1976-05-20
FR2291648A1 (fr) 1976-06-11
FR2291648B1 (de) 1981-08-07
DE2551785A1 (de) 1976-05-20
US3944949A (en) 1976-03-16
DE2551785B2 (de) 1979-03-01
BE835311A (fr) 1976-03-01
DE2551785C3 (de) 1979-10-31
NL168381B (nl) 1981-10-16
JPS5237755A (en) 1977-03-23
AT346938B (de) 1978-12-11
NL168381C (nl) 1982-03-16
CA1060553A (en) 1979-08-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19941027